public void DeleteAllItemsInCart()
{
// Arrange
Item item3 = Consume.AddItemToCart(3, 1);
Assert.NotNull(item3);
Item item4 = Consume.AddItemToCart(4, 1);
Assert.NotNull(item4);
List <Item> items = Consume.GetCartItems();
Assert.False(!items.Any());
// Act
Consume.DeleteAllItemsInCart();
// Assert
List <Item> i = Consume.GetCartItems();
bool isEmpty = !i.Any();
Assert.True(isEmpty);
}